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Old 12-05-2017, 03:17 PM   #1
BHTH
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What's This Hole For?

I've got a 1978 K5 Blazer with the Cheyenne package, there is a hole in the firewall almost directly in line with the transmission dipstick tube. It appears to be a factory hole with no grommet or plug. What's it for?
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Old 12-07-2017, 03:13 AM   #2
mcmlxix
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Re: What's This Hole For?

AC truck or Non-AC truck?
I also have a 78 K5 that came with factory AC.
I can check to see what's there on mine....
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Old 12-07-2017, 11:07 AM   #3
BHTH
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Re: What's This Hole For?

Quote:
Originally Posted by mcmlxix View Post
AC truck or Non-AC truck?
I also have a 78 K5 that came with factory AC.
I can check to see what's there on mine....
It is a non-AC truck, and I lied, it does have a grommet and the interior firewall cover has a hole in it to expose the grommet.
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Old 12-13-2017, 04:22 PM   #4
BHTH
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Re: What's This Hole For?

Backed this out to the square body forum with some pics.

http://67-72chevytrucks.com/vboard/s...51#post8104151
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